package top.lyc829.days.config;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.omg.PortableServer.SERVANT_RETENTION_POLICY_ID;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

//@Configuration
//public class MyFastJsonConfig {
//
//    @Bean
//    FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
//        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
//        FastJsonConfig config = new FastJsonConfig();
//        config.setDateFormat("yyyy-MM-dd");
//        config.setCharset(Charset.forName("UTF-8"));
//        config.setSerializerFeatures (
//                SerializerFeature.WriteClassName,
//                SerializerFeature.WriteMapNullValue,
//                SerializerFeature.PrettyFormat,
//                SerializerFeature.WriteNullListAsEmpty,
//                SerializerFeature.WriteNullStringAsEmpty
//        );
//
//        converter.setFastJsonConfig(config);
//
//        return converter;
//    }
//
//}

@Configuration
@EnableWebMvc
public class MyFastJsonConfig implements WebMvcConfigurer {
    private final Logger logger = LoggerFactory.getLogger(WebMvcConfigurer.class);

    //使用阿里 FastJson 作为JSON MessageConverter
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        //调用父类的配置
        WebMvcConfigurer.super.configureMessageConverters(converters);
        //创建fastJson消息转换器
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();

        //升级最新版本需加=============================================================
        List<MediaType> supportedMediaTypes = new ArrayList<>();
        supportedMediaTypes.add(MediaType.APPLICATION_JSON);
        supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        supportedMediaTypes.add(MediaType.APPLICATION_ATOM_XML);
        supportedMediaTypes.add(MediaType.APPLICATION_FORM_URLENCODED);
        supportedMediaTypes.add(MediaType.APPLICATION_OCTET_STREAM);
        supportedMediaTypes.add(MediaType.APPLICATION_PDF);
        supportedMediaTypes.add(MediaType.APPLICATION_RSS_XML);
        supportedMediaTypes.add(MediaType.APPLICATION_XHTML_XML);
        supportedMediaTypes.add(MediaType.APPLICATION_XML);
        supportedMediaTypes.add(MediaType.IMAGE_GIF);
        supportedMediaTypes.add(MediaType.IMAGE_JPEG);
        supportedMediaTypes.add(MediaType.IMAGE_PNG);
        supportedMediaTypes.add(MediaType.TEXT_EVENT_STREAM);
        supportedMediaTypes.add(MediaType.TEXT_HTML);
        supportedMediaTypes.add(MediaType.TEXT_MARKDOWN);
        supportedMediaTypes.add(MediaType.TEXT_PLAIN);
        supportedMediaTypes.add(MediaType.TEXT_XML);
        fastConverter.setSupportedMediaTypes(supportedMediaTypes);

        //创建配置类
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        //修改配置返回内容的过滤
        //WriteNullListAsEmpty  ：List字段如果为null,输出为[],而非null
        //WriteNullStringAsEmpty ： 字符类型字段如果为null,输出为"",而非null
        //DisableCircularReferenceDetect ：消除对同一对象循环引用的问题，默认为false（如果不配置有可能会进入死循环）
        //WriteNullBooleanAsFalse：Boolean字段如果为null,输出为false,而非null
        //WriteMapNullValue：是否输出值为null的字段,默认为false
        fastJsonConfig.setSerializerFeatures(
                SerializerFeature.WriteClassName,
                SerializerFeature.WriteMapNullValue,
                SerializerFeature.PrettyFormat,
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteNullStringAsEmpty
        );
        fastConverter.setFastJsonConfig(fastJsonConfig);
        //将fastjson添加到视图消息转换器列表内
        converters.add(fastConverter);
    }

}

//@Configuration
//public class MyFastJsonConfig implements WebMvcConfigurer {
//    @Override
//    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
//        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
//        FastJsonConfig config = new FastJsonConfig();
//        config.setDateFormat("yyyy-MM-dd");
//        config.setCharset(Charset.forName("UTF-8"));
//        config.setSerializerFeatures(
//                SerializerFeature.WriteClassName,
//                SerializerFeature.WriteMapNullValue,
//                SerializerFeature.PrettyFormat,
//                SerializerFeature.WriteNullListAsEmpty,
//                SerializerFeature.WriteNullStringAsEmpty
//        );
//        converter.setFastJsonConfig(config);
//        converters.add(converter);
//    }
//}


